Yaskawa Remote Analog I/O PCB for use with Microtrac DSD LAN - Manual (Page 2)

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I/O EXPANSION BUS
The I/O expansion bus connects the
RIO to Remote I/O PCBs through use of a
40 pin ribbon cable. The bus is intended to
be connected in a daisy chain style from
Remote I/O PCB to Remote I/O PCB,
originating from the RIO. There are two I/O
expansion bus connectors (J1-A and J1-B)
on the ANIO that allows the ANIO to be
added into a given system to meet specific
requirements. The intention of having two
connectors rather than one is to simplify the
making of the ribbon cables. Multiple
ribbon cables with one connector on each
end can interconnect an entire remote I/O
system rather than one complex cable with
many connectors.
The I/O expansion bus carries logic
level signals and power to the Remote I/O
PCBs. Care should be taken in the routing
of the cable in order to keep it away from
noise inducing circuitry. Furthermore, the
maximum I/O expansion bus length should
not exceed 10 feet.
CHANNEL SELECT JUMPER
The channel select jumper (J2) allows
the ANIO to be defined at a previously
specified channel. The channel select
jumper must be in place prior to powering
up a remote I/O system in order for the RIO
to recognize that the ANIO exists. Refer to
the drive schematic diagram for the proper
jumper positions.
NON-ISOLATED ANALOG INPUTS
The ANIO has 4 non-isolated analog
inputs. The inputs have a range of +/- 10
Volts with respect to COMMON, are single
ended, include a filter with a time constant
of about 1 millisecond, and have 50K ohm
input resistance. The overall A/D con-
version accuracy is +/- 0.4% with 12 bits of
resolution over the full scale range.
The non-isolated analog inputs are
called ANACH0 through ANACH3 and can be
connected through TB1 pins 3, 5, 7, and 9,
respectively. Connection terminals are
provided that will supply +10V reference
(TB1 pins 12, 13), -10V reference (TB1 pins
14, 15), COMMON (TB1 pins 4, 6, 8, 10) and
shield tie points (TB1 pins 1, 2, 11). The +/-
10 V references will each supply 50 milli-
amps of current. The shield tie points are
shorted together and to the non-isolated
analog output shield tie points on the PCB,
and are not connected to any other PCB
signals.
NON-ISOLATED ANALOG OUTPUTS
The ANIO has 4 non-isolated analog
outputs. The outputs have a range of +/- 10
Volts with respect to COMMON, are single
ended, and have an output drive limited to
+/- 4 mA. The D/A conversion accuracy is
+/- 0.4% with 12 bits of resolution over the
full scale range.
The non-isolated analog outputs are
called ANOUT0 through ANOUT3 and can be
connected through TB1 pins 17, 19, 21, and
23, respectively. Connection terminals are
provided that will supply COMMON (TB1
pins 18, 20, 22, 24) and shield tie points
(TB1 pins 16, 25). The shield tie points are
shorted together and to three non-isolated
analog input shield tie points on the PCB,
and are not connected to any other PCB
signals.
RD 799-10